Boat construction



July 0, 1945.

C. H. CLEMENT, JR

BOAT CONSTRUCTION Filed March 1, 1943 2 Shee ts-Sheet 1 3mm Carl H. 6767726 nit].

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July 10, 1945.

- C. H. CLEMENT, JR,

BOAT CONSTRUCTION riled March 1', 1943 2 Sheets- Sheet 2 Udr/ H. Clement Jr,

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A Wm M .wm m m 3 P m n sm i w www Patented July p1945 l b1 i l $2,379,883. v 1 AT il b i9 oanin. Clement, Jr., Unjtedstatemrm J FortBelvoinVa. -l l a if Application that "1, 194's, strait... 477,581 l t f The invention describediherein may bemanutime to each of factured and used by jorjf or the Government for l l to the lower edge of the side panels. 14., An insidegovernmental purposes, without. payment to me bottom is thenapplied over the top of thesebeain l.

of anyroyalty thereon. and rigidlyf astened to t em; .rrnis nset bottom This inventionrlates to a inethodof constructis then attached firmly..to..the side panels M of 1 ing storm boats and more-particularly to a boat the boat and to the page 21Gformed hy gluin in which transverse frameshave been eliminated. .and screwingan oak stripqto the siclqlpanel. It

It'is an object of this" invention to provide a 1 i will be noted that there are no transverse mendt boat design which will. maintainits shape par- 1 bers in the supporting frame of the boat.

ticularly in the fore andaft direction and which lo At the stern of the boat the inner floor .IZ is will be able to withstand severetorsional loads cut away to form themotor well [6. A sub-floor which are carried through] the beam formed by H, and a well panel l9are placed in position and,

. the bottom,sides and the inner floor.

I together withlthe inner sides of the side beams It is a further objectfof this invention to pro 22and. thestern board or panel 2'l,form :a closed vide a boat of this typeof construction which is is well. V I i simple and consists of arelatively small number i The general shape of the boat will be clear. of parts. l i from a consideration of FigsQl and 4 in whichthe' It is still another object of this invention to floor level isindicated by the dotted line 28. It.

provide a strong, lightweight boat designedfor will be seen that there is provided a wide boat use with highspeed motors which will withstand e0 with a relatively blunt nose. This feature will the shock of waves and even of beaching the boat lend stability to the boat and facilitate loading l l at high speed. m l v and unloading. l l l These and other objects and advantages of the r The construction! of the side beams 22 .will be invention will become apparent upon a consideraclear from a, consideration of Figs. 2 and 8, re-

tion of the following detailed description when 35 ferring to which it will be seen that a hollow taken in conjunction -with the accompanying beam construction. is provided. .As a top spacer drawings, in which--- l l for the beam I prefer to use :an oak stripB D. Fig. l is a side elevation of a boat embodying Attached on either side of thefstrip are ply-.

the principles of the invention; wood sides34, the top edges of which are straight Fig. 2 is a cross-sectional view taken along the 0 lines and. the lower edges of which conform to line f g a the longitudinal curvature of the boatflvat the Fig. 3 is a cross-sectional view taken along the position in which the beam is to be used. A line 3-3of Fig. 1; l E

Fig. 4 is a plan view of one-half of the boat; 1 pleting the formation of the beam. l

l lower oak strip 33 is fastened into place com;

Fig. 5 is an enlarged plan view of the stern It will be seen thatfthe construction thus defof the boat; l t scribed provides a lightweight hollow beam which Fig. 6 is a view. in perspective of the completed has been builtup on the'same general plan as a boat in which the inner bottom has been broke spar .for. an aeroplane. This type of construction away to illust the beam P me combines great mechanical strength with extreme Fig, 7 is a longitudinal cross-section of the lightness. center of the boat; and v x l Fig. 8 is alongitudinal cross-section of one of i 1 the same general type of construction is usedffor the side beams. the keel beam 20, except that thestern side pan- Referring particularlyto Fig 6, it will be seen I els 34 arelpartially. cut awayto form a support that there has been provided an Outer bottom for thesub-floor n of the motor wen. Similar an inner bottom Side Panels e oak spacer strips 30 and 33 are used. to givethe side panels I4 are attached to the bottom 10 and desiredlightweight construction..

Referring to Figs. 2. S and 7, it will be clear that f reinforced by 05k chines Actingasa spreader A boat constructed as described above obtains". between the. inner and outer bottoms and in its transverse strength by means of thebOX be m lon itudin l en side beams 2 are pro- 6 formed by the inside and outside bottoms and d t e C c n t i fln Q Which W l b the sidepanels. The hollow beams in this condescribed later. struction act primarily to. keep theoutsideand inl A keel beam 20 is centeredbetween side beams side beams spaced properly. However, their use 1 22 a P rfo s the dual function of a keel and ,makes it possible to dividethe bottom into four aspreader. The outsidebottom of the boatis faswatertight sections which will make the boat harder to sink in case of puncture to the outside skin.

While I have described a single embodiment of my invention, it is to be understood that I do not 'wish to be limited to the particular details and 1. A uni-directionally braced hull construction comprising inner and outer vertically spaced hull bottoms, side and stem panels aflixed to said'bottoms along their edges, said panels; sealing-the space between and coacting with said bottoms to form in effect a single box beam coextensive with. the length of the hull and a framework disposed form in effect a single box beam coextensive with the length of the hull and a framework disposed between and attached to the opposing faces of said bottoms, said framework being formed of a trio of equi-spaced box beams extending in parallelism longitudinally of the hull, the intermediate beam of said trio serving as a keel beam, said beams dividing said single, box beam into a series of longitudinally extending watertight compartmerits. a i

3. A uni-directionally braced hull construction comprising inner and outer vertically spaced hull bottoms, side and stern panels afiixed to said bottoms; alongtheir edges, said panels sealing the between and attached to the opposing faces of said bottoms, said framework being formed of; a

plurality of box beams aligned parallel to the longitudinal axis of said hull and dividing said single box beam into a series of. longitudinally extending watertight compartments.

2; A. uni-clirectio'nalh braced hull construction comprising inner and outer vertically spacedhull bottoms, side-and stern panels affixed to said bot toms along their ed e said panels sealing the space between and coacting with said bottoms to space between and coacting with said bottoms to form in effect a single box beam coextensive with the length of the hull and a framework disposed between and attached to the opposing faces of said bottoms; said framework being formed of a plurality of box beams aligned parallel to the longitudinal, axis of said hull, each 01 said beams embodying upper and. lower, oak, spacer strips afiixed to the upper and lower edges respectively of a pair of laterally spaced plywood side. pieces, said beams dividing said, single box beam into'a series of longitudinally, extending watertight compartments. t a

CARL HI. CLEMENT, .Ia. 

